[Commercial GRASS support | Sponsor GRASS Development ]
If you are interested to support GRASS development, please let us know!
[ See also: OSGeo Service Providers - international
list of companies supporting Free Software GIS]
GRASS GIS is released under GNU General Public License.
Perhaps you ask: Why use free software? If interested, you may read the article "Why Software Should Not Have Owners" by Richard Stallman. To distinguish between "Free software", "Commercial software" and "Proprietary software" please read on here.
However, perhaps you want some special functionality. Currently, the best is to hire somebody to actually add the functionality you need. Contract for the development directly with the stipulation that functionality be released and integrated into the Free Software GRASS source tree under GNU GPL. Students who are interested in GRASS anyway are often happy to get some funding for their hobby. You can also hire professionals (see list above, those companies are already involved in GRASS development or directly contact the GRASS developers).
Consider to contact National GRASS user groups if they have ideas to accept GRASS fundings.
It is likely that programmers will add the desired functionality for you. Other GRASS users can benefit as GRASS development is done similiar to many other Free Software projects: If the enhancement is useful for a wide audience, it is likely to be integrated into the GRASS main code.